Adds the fingerprint given as an argument to the current user's currently
selected finger if a finger is selected and the GUI is in "waiting for a
new fingerprint" state.
If GUI is waiting for a new fingerprint and an unrecognized fingerprint was
scanned, this method is called and the GUI can then add this fingerprint to
the current user.
The purpose of this class is to create a https connection to a defined website and
identify the user as a part of department of computer science's staff by using
http-protocol's basic authentication method.